纯Ti和Ti-Pd合金在有、无添加H_2O_2的磷酸盐缓冲溶液中的耐腐蚀性能（英文）
采用动电位和电化学阻抗谱技术研究了纯Ti（2级）和Ti-Pd合金（7级）的耐腐蚀性能。实验温度为36.6℃,实验溶液包括模拟的健康人体条件的pH7.4的PBS溶液和添加了H2O2（0.015mol/L）的pH5.2的炎症状态的PBS溶液。Ti-Pd合金（7级Ti）,在含H2O2的PBS溶液中,其耐腐蚀性能比纯Ti的好（较低的腐蚀电流密度）,表明其是一种很好的骨科植入材料。
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Synthesis and analysis of graphene-oxide membranes
Graphit Oxid (GO) wird durch Oxidation mit starken Säuren aus Graphit hergestellt. GO kann auf einfache Art in einlagige Graphenoxid Flocken getrennt werden. Das Interesse an Graphenoxid wuchs in den letzten Jahren, da es unter anderem als ein Ausgangsstoff für Graphen dienen kann, welches wegen seiner besonderen elek…
Formulation & Evaluation of Oral Disintegrating Tablets of Lamotrigine Solid Dispersions
Lamotrigine is used in the treatment of CNS disorders, particularly epilepsy; pain; oedema; multiple sclerosis and psychiatric indications including bipolar disorder. Lamotrigine belongs to biopharmaceutical classification systems, BCS class II (Low solubility & High permeability). In addition, it requires immediate t…
基于2{[Ni（m．02NC6H4COO）2]（4，4＇-bpy）4／2}聚合层的超分子配合物的研究
水热条件下，Ni（NO3）3·6H2O与间硝基苯甲酸（HL=m—NO2C6H4COO）及4，4’-联吡啶（4，4’-bpy）反应形成二维层状聚合物：{[Ni（m．02NC6H4COO）2]（4，4＇-bpy）4／2}结构分析表明，Ni（11）原子与间硝基苯甲酸配位形成NiL：单元，该单元通过4，4’．联吡啶桥联形成具（4。·6。）拓扑的二维层状配位聚合物。相邻层与层之间通过间硝基苯甲酸之间的芳环堆积作用形成二重穿插的d—Po拓扑结构。此外变温磁化率显示标题配合物中心Ni原子间存在铁磁耦合作用，最佳拟合结果为g=2，D=79．15cm-1，J=15．49cm-1，zJ’0．34cm-1，FO=0．78，一致性因子R=8．95×10-…
CaS:Eu,Sm荧光粉表面二氧化硅包覆对其光激励发光特性的影响(英文)
改进了CaS∶Eu,Sm荧光粉在实时剂量计系统中的稳定性和实用性。以不同体积的正硅酸乙酯作为前驱体,采用溶胶凝胶法对CaS∶Eu,Sm荧光粉进行表面包覆。分别使用荧光分光光度计和酸度计对荧光粉的发光特性和防水特性进行表征。实验结果显示当质量分数为5%时,包覆层能明显提高荧光粉的稳定性且不影响荧光粉的发光强度。从材料的光激励发光和剂量响应测试实验中可以得出材料的退火特性以及相应的辐射剂量值。以CaS∶Eu,Sm荧光粉为基础的辐射剂量测试系统显示在0.1～300 Gy范围内具有良好的线性关系。结果显示表面包覆层明显抑制光激励发光特性,而且随着辐射剂量的增加,这种影响愈来愈显著。最后,我们提出了以光激励发光技术为基础的辐射剂量在线测试改…
Synthesis, Structure and Optical Property of ZnAl2O4∶Tb3+ Phosphor
通过溶胶-凝胶法制备出不同Tb3+掺杂浓度和不同二次煅烧温度下的ZnAl2O4∶Tb3+荧光粉,并利用X射线衍射(XRD)和荧光光谱等对样品进行了表征。由XRD结果可知,当Tb3+掺杂的摩尔分数不大于9%,二次煅烧温度在600℃以上时,所得粉体为结晶性良好的尖晶石相。在紫外光激发下,ZnAl2O4∶Tb3+荧光粉的发射光谱由位于488 nm(5D4→7F6)、542 nm(5D4→7F5)、587 nm(5D4→7F4)和621.5 nm(5D4→7F3)的4个发射峰组成。研究发现,Tb3+的掺杂浓度和二次煅烧温度对样品发光强度有着重要影响,当Tb3+的摩尔分数为5%,二次煅烧温度为900℃时,ZnAl2O4∶Tb3+荧光粉的发光…
PAFC/CTS/红粘土复合絮凝剂对天然胶乳废水的处理
采用聚合氯化铝铁（PAFC）与壳聚糖（CTS）、红粘土复合,制备三元复合絮凝剂,并对胶乳废水进行处理。分别考察了絮凝剂各组分配比、絮凝剂投加量、絮凝搅拌强度对天然胶乳废水的浊度去除率和COD去除率的影响。研究结果表明,当以300 r/min搅拌2min,80~100 r/min搅拌5 min,15~25 r/min搅拌10 min,聚合氯化铝铁/壳聚糖复合絮凝剂组分质量比为PAFC：CTS=1：0.16,投加量为6 mL/L,红粘土投加量0.09 g/L时,静置沉降10 min时对废水浊度去除率和24 h COD去除率分别达98%和80%以上。比单独使用PAFC絮凝剂减少了约一半的投料量。此外,通过扫描电镜观察絮体形貌,初步探讨了…
Особенности электропроводности и свойств аморфных полупроводников на основе асфальтенов
Phenomenological method of electron spectroscopy studied the electronic spectra of asphaltenes of different origins. Results of the study show that the asphaltenes cracking residue and tar West Siberian oil behave as semiconductors (IP = 4,70 ÷ 4,74 eV, EA = 2,07 ÷ 2,10 eV ), and asphaltenes tar and asphalt deasphalti…
Single-Step Assembly of DOX/ICG Loaded Lipid Polymer Nanoparticles for Highly Effective Chemo-photothermal Combination Therapy
A combination of chemotherapy and photothermal therapy has emerged as a promising strategy for cancer therapy. To ensure the chemotherapeutic drug and photothermal agent could be simultaneously delivered to a tumor region to exert their synergistic effect, a safe and efficient delivery system is highly desirable. Here…
Mixed ligand Complexes of Cobalt (II) and Nickel (II) with 2-{(E)-[(3-hydroxyphenyl)imino]methyl}phenol and Imidazole compounds
The bi-dentate Schiff base 2-{(E)-[(3-hydroxyphenyl)imino]methyl}phenol derived from the reaction between salicylaldehyde and 3-aminophenol was synthesised ligand. Mixed complexes of (HPIMP) Co(II) and Ni(II) with imidazole (IMD) were synthesised and characterized by spectral analysis (UV-Visible and IR techniques), m…
Modifikation magnetischer Nanoträger für den Einsatz in enzymatisch katalysierten Reaktionen
Die Anwendung magnetischer Nanoträger bietet neue Perspektiven als Einsatz für die Enzymimmobilisierung. Deshalb untersucht diese Arbeit die Oberflächenmodifikation des Eisenoxides Magnetit mit phenolischen Verbindungen. Dabei konnten einige strukturell bedingte Einflüsse der funktionalisierenden Moleküle auf die Anbi…
Исследование напряженно-деформированного состояния участка магистрального газопровода «Нижне-Квакчинское газоконденсатное месторождение – г. Петропавловск-Камчатский» методом конечных элементов
This article provides an example of using ANSYS software package for calculating the stress-strain state of main gas pipeline section to determine the maximum loads and strains.
Impact of space charge on Perovskite Oxide based non-volatile memories.
A recent study reported that the amount of information stored by humankind in 2007 was 2.9×10^20 bytes, which grows at an annual rate of 23%. Most of the information is stored in magnetic hard disk drives, which are bulky and slow. At present, Flash memory is widely used for portable electronics because of its low cos…
Estudo da redução nos limites de detecção de detectores de traços utilizados na medida da taxa de reação 10B(n,α) 7 Li através de experimentos de annealing e ataque químico
A Terapia de Captura de Neutrons pelo Boro (BNCT do ingles Boron Neutron Capture Therapy) e um metodo experimental de radioterapia para tratamento de câncer. E baseada na taxa de reacao 10B(n,a)7 Li que pode ser medida atraves de detectores de tracos, capazes de registrar eventos que incidem sobre estes. Com este regi…
Měření hysterézní smyčky feromagnetika pomocí osciloskopu - laboratorní úloha
Import 26/06/2013
Terahertz wave manipulation with metamaterials based on metal and graphene.
The terahertz (THz) technology provides with exciting possibilities for spectroscopy, food quality control, defense, communication and biomedical imaging [1]. Being relatively young (the massive exploitation of the THz range began only in the beginning of 1990-ies), the THz science demands for active and passive mater…
Optimizing a Nanovehicle for Pancreatic Cancer Treatment
This Dissertation/Thesis is brought to you for free and open access by Wellesley College Digital Scholarship and Archive. It has been accepted for inclusion in Honors Thesis Collection by an authorized administrator of Wellesley College Digital Scholarship and Archive. For more information, please contact
Zr—Al合金化学镀Ni—P镀层工艺研究
采用化学镀技术在经磷化处理后的Al含量为8．0％（质量分数）的Zr—Al合金表面进行施镀，得到了表面镀覆均匀、为明显胞状物的非晶Ni—P镀层。并对镀层进行显微硬度测试、电化学腐蚀极化行为、XRD和SEM分析。研究确定了磷化液的配方：H2PO4为15g／L（质量浓度，下同），ZnSOt为3g／L，NaF为1．5g／L，有机胺（硫脲）为0．15g／L，pH值为2．5～3．0，温度为45℃，时间为2min；镀液配方：NiSO4为20g／L，NaH2P02为40g／L，（NH4）2SO,为40g／L，CH。COONa为40g／L，（CH3COO）2Pb为1mg／L，控制pH值为5．5～6．0，温度为80℃，施镀1h。结果表明，Zr-Al合…
Elaboration et étude des propriétés physiques de couches minces monocristallines d'alliage de Heusler à faible amortissement magnétique pour composants hyperfréquences
Cette these s'inscrit dans le domaine des materiaux magnetiques pour les hyperfrequences. Les materiaux magnetiques les plus utilises dans des dispositifs hyperfrequences sont des ferrites, en particulier les grenats qui ont un tres faible amortissement magnetique (de l'ordre de 0,0001). La course a la miniaturisation…
固体酸SO4^2-/SnO2的表征及其催化水解反应性能
以氯化锡、氨水和硫酸为反应物,经化学沉淀、硫酸浸渍、煅烧制备了SO42-/SnO2固体酸催化剂,并采用XRD、TEM、FTIR、TG、低温氮气吸脱附、Hammett指示剂法等手段对样品进行了表征。结果表明：SO42-/SnO2固体酸催化剂晶相为四方晶型SnO2,粒径在10～30 nm范围内,比表面积为11.2～131.4 m2/g。硫酸根与表面锡配位形成了螯合和桥式两种超强酸活性位,其数量随促进剂硫酸浓度的升高而增大,500℃煅烧的固体酸样品具有高硫酸根负载量和超强酸活性位,升高煅烧温度导致硫酸根部分分解流失。SO42-/SnO2固体酸催化大麻籽油水解合成脂肪酸的反应活性,随其酸强度和酸性位数量的增加而升高,油脂转化率达到95%。